148 Bulletin Wisconsin Natural History Society [Vol.13, No. 3 
came the night of May 4, and eleven new birds were discovered 
the next day. In the region we are considering, the crests of 
the waves came on April 20 (ten species), May 2, (twenty-eight 
species), and May 5 (fourteen species). 
We are perhaps unaccustomed to think that resident species 
migrate, yet there is, in some cases at least, a very definite migra- 
tion among the resident species. This fact was most noticeable 
in the ruffed grouse and the quail. 
These two species are typical of distinctly different associa- 
tions at most times of the year. In as much as the ruffed grouse 
spends the greater part of the year in the woods, nesting and 
feeding there, it is a representative of the Sylvan association. 
The quail, on the other hand, is distinctly a bird of the Argian 
association, and was never found encroaching on the domain 
of the grouse. Yet these species wintered together in the 
tangled underbrush of the swamp. Just when they left their 
summer habitat is not known, but they were found together in 
the swamp on December 5. Here they remained in close 
association all winter: in association so close that often both 
species would be flushed at the same instant. Living as they 
did in an area of very limited food-supply (so far as variety is 
concerned) their food was essentially similar, consisting of grass 
and weed seeds, and, in the case of the quail at least, some of 
the low buds of the dog-weed, Cornus stolonifera . 
On April 5 the quail had left the Cornus society, and was 
found only in the Spartina society, where it remained until 
April 15. On this date there was no sign of it in the swamp 
proper, and search disclosed it scattered along the course of 
the big spring, about mid-way between its winter habitat and 
the open fields. This was still Spartina society, though rapidly 
approaching the Argian association. Here it remained until 
April 21, when it deserted the Spartina society, and the birds 
were to be heard in full call in the open fields beyond, where 
they remained until the following fall. 
The grouse, in the meanwhile, remained in the Cornus society 
until April 22. The next two days were spent in the Spartina 
society, but at the edge of the woods. On April 25 the birds 
were heard drumming in the heart of the woods. It seems not 
unlikely that the difference in the time of migration of these 
